100 lines
3 KiB
Bash
100 lines
3 KiB
Bash
#! @shell@
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set -e
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export PATH=/empty
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for i in @path@; do PATH=$PATH:$i/bin:$i/sbin; done
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action="$1"
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if ! test -e /etc/NIXOS; then
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echo "This is not a NixOS installation (/etc/NIXOS) is missing!"
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exit 1
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fi
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if test -z "$action"; then
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cat <<EOF
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Usage: $0 [switch|boot|test]
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switch: make the configuration the boot default and activate now
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boot: make the configuration the boot default
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test: activate the configuration, but don't make it the boot default
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EOF
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exit 1
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fi
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if test "$action" = "switch" -o "$action" = "boot"; then
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if test -n "@grubDevice@"; then
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mkdir -m 0700 -p /boot/grub
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@grubMenuBuilder@ @out@
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if test "$NIXOS_INSTALL_GRUB" = 1; then
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@grub@/sbin/grub-install "@grubDevice@" --no-floppy --recheck
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fi
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else
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echo "Warning: don't know how to make this configuration bootable; please set \`boot.grubDevice'." 1>&2
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fi
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fi
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if test "$action" = "switch" -o "$action" = "test"; then
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oldVersion=$(cat /var/run/current-system/upstart-interface-version 2> /dev/null || echo 0)
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newVersion=$(cat @out@/upstart-interface-version 2> /dev/null || echo 0)
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if test "$oldVersion" -ne "$newVersion"; then
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cat <<EOF
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Warning: the new NixOS configuration has an Upstart version that is
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incompatible with the current version. The new configuration won't
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take effect until you reboot the system.
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EOF
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exit 1
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fi
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oldEvents=$(readlink -f /etc/event.d || true)
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newEvents=$(readlink -f @out@/etc/event.d)
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#echo "old: $oldEvents"
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#echo "new: $newEvents"
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stopJob() {
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local job=$1
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initctl stop "$job"
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while ! initctl status "$job" 2>&1 | grep -q "(stop) waiting"; do
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echo "waiting for $job to stop..."
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sleep 1
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done
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}
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# Stop all services that are not in the new Upstart
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# configuration.
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for event in $(cd $oldEvents && ls); do
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if ! test -e "$newEvents/$event"; then
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echo "stopping $event..."
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stopJob $event
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fi
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done
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# Activate the new configuration (i.e., update /etc, make
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# accounts, and so on).
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echo "activating the configuration..."
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@out@/activate @out@
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# Make Upstart reload its events. !!! Should wait until it has
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# finished processing its stop events.
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kill -TERM 1
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# Start all new services and restart all changed services.
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for event in $(cd $newEvents && ls); do
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# Hack: skip the sys-* and ctrl-alt-delete events.
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# Another hack: don't restart the X server (that would kill all the clients).
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if echo "$event" | grep -q "^sys-\|^ctrl-\|^xserver"; then continue; fi
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if ! test -e "$oldEvents/$event"; then
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echo "starting $event..."
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initctl start "$event"
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elif test "$(readlink "$oldEvents/$event")" != "$(readlink "$newEvents/$event")"; then
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echo "restarting $event..."
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stopJob $event
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initctl start "$event"
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fi
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done
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fi
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